This Byron Wireless Mesh Finish Doorbell Set features a plug-in chime for convenient placement anywhere in your home. It offers a wireless range of up to 150m and includes a bell push with IP44 protection rating. The set provides 16 melodies, 5 adjustable volume levels, and a visual alert system. The doorbell unit measures 100 x 70 x 50 mm (HxWxD), and the push button measures 86 x 36 x 17 mm (HxWxD). Installation and pairing are easy with all mounting materials included.